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51List of military aircraft of the United States (naval) — This list of military aircraft of the United States includes prototype, pre production and operational types. For aircraft currently in service, see the List of active United States military aircraft. Prototypes are normally prefixed with X and… …
52Douglas T2D — T2D Douglas T2D 1 of VP 1 Role Torpedo bomber Manufacturer …
53Douglas O-31 — O 31 Role Observation Manufacturer Douglas Aircraft Company Introduction 1930 Primary user United States Army Air Corps Produced 1930 1933 Number built 13 …
54Douglas O-43 — 0 43 Role Observation Manufacturer Douglas Aircraft Company Introduction 1930 Primary user United States Army Air Corps Number built 24[1] Variants …
55Douglas O-2 — O 2 Role Observation plane Manufacturer Douglas Aircraft Company …
56Douglas C-132 — C 132 Role Cargo transport National origin United States Manufacturer Douglas Aircraft Company Number built 0 Developed from C 124 Globemaster II T …
57Curtiss T-32 Condor II — T 32 Condor II A USAAC YC 30 in 1933 Role Biplane transport and bomber Manufacturer …
58Douglas Cloudster — Cloudster Role two seat long range biplane Manufacturer Davis Douglas Company Designer Donald Douglas First flight 1921 Retired 1926 Status Destroyed Number built …
59Curtiss Kingbird — Model 55 Kingbird Role Airliner Manufacturer Curtiss Wright Designer Theodore Paul Wright, Al Wedburg First flight 1929 Primary users Eastern Air Transport United States Marine Corps Number built …
60Douglas XFD — XFD Role Fighter National origin United States …
